Micro-LED pumped polymer laser: a discussion of future pump sources for organic lasers

Johannes Herrnsdorf*, Yue Wang, Jonathan J. D. McKendry, Zheng Gong, David Massoubre, Benoit Guilhabert, Georgios Tsiminis, Graham A. Turnbull, Ifor D. W. Samuel, Nicolas Laurand, Erdan Gu, Martin D. Dawson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Optical pumping conditions for organic solid-state lasers (OSLs) are discussed with particular emphasis on the use of gallium nitride based light-emitting diodes (LEDs) as pump sources. LEDs operate in a regime where the pump should be optimized for a short rise time and high peak intensity, whereas fall time and overall pulse duration are less important. Lasers pumped with this approach need to have very low thresholds which can now be routinely created using (one-dimensional) distributed feedback lasers. In this particular case stripe-shaped excitation with linearly polarized light is beneficial. Arrays of micron-sized flip-chip LEDs have been arranged in an appropriate stripe shape and the array dimensions were chosen such that the divergence of LED emission does not cause a loss in peak intensity. These micro-LED arrays have successfully been used to pump OSLs with thresholds near 300 W/cm(2) (approximate to 9ns rise time, 35ns pulse duration), paving the way for compact arrays of indirectly electrically pumped OSLs.

Original languageEnglish
Pages (from-to)1065-1078
Number of pages14
JournalLaser & Photonics Reviews
Volume7
Issue number6
DOIs
Publication statusPublished - Nov 2013

Keywords

  • Organic semiconductor laser
  • light-emitting diode
  • indirect electrical pumping
  • hybrid organic
  • inorganic optoelectronics
  • LIGHT-EMITTING-DIODES
  • PI-CONJUGATED POLYMER
  • ENERGY-TRANSFER
  • DYE-LASER
  • SEMICONDUCTOR-LASERS
  • LASING ACTION
  • OPTICAL GAIN
  • THIN-FILMS
  • WAVE-GUIDE
  • THRESHOLD

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